<?php
$start = microtime(True);
$sum = 0;
for($i=1; $i<=10; $i++){
   $sum += $i;
}
$end = microtime(True);

echo $end - $start;

var_dump(memory_get_usage()/1024);

define('LIYANG', 365*30);
//const LIYANG_ZHENPENG = 365*30;

echo LIYANG;
echo LIYANG_ZHENPENG;

class A{
	public function hello(){
		echo "hello";
	}
}


$arr = array(
	'zhl' => 27,
	'zhenpeng' => 57
);

$a = new A();
$a->hello();
